tailieunhanh - Characteristics of dioxin and furan emissions from selected electric arc furnaces in Vietnam

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) released from thermal processes of various industries have urgently concerned. Stack gas samples were collected from selected electric arc furnaces (EAFs) in Vietnam in order to investigation of PCDD/F concentration, congener profile and emission factors. EPA method 23 was used following the requirements for isokinetic sampling of stack gas emission. | VNU Journal of Science: Earth and Environmental Sciences, Vol. 32, No. 2 (2016) 79-84 Characteristics of Dioxin and Furan Emissions from Selected Electric Arc Furnaces in Vietnam Nguyen Van Thuong1,2,*, Do Quang Huy2, Nguyen Hung Minh1 1 Center for Environmental Monitoring, Vietnam Environmental Administration, No. 556, Nguyen Van Cu, Hanoi, Vietnam 2 Faculty of Environmental Science, Hanoi University of Science, No. 334 Nguyen Trai, Hanoi, Vietnam Received 08 January 2016 Revised 22 January 2016; Accepted 28 June 2016 Abstract: Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) released from thermal processes of various industries have urgently concerned. Stack gas samples were collected from selected electric arc furnaces (EAFs) in Vietnam in order to investigation of PCDD/F concentration, congener profile and emission factors. EPA method 23 was used following the requirements for isokinetic sampling of stack gas emission. The quantification of PCDD/Fs was carried out by high resolution gas chromatography, coupled with high resolution mass spectrometry (HRGC/HRMS). The results suggested that mass concentration and TEQ of PCDD/F in stack gas samples from EAFs in Vietnam ranged from – ng/Nm3 and – ngTEQ/Nm3, respectively. Emission factors of PCDD/Fs are determined in the range of – µgTEQ/ton of product. Emission factor of PCDD/F from the EAF plants in Vietnam were equivalent to those in some countries in Asia, but higher than those of the industrialized countries in European Union. Keywords: PCDD/Fs, EAFs, Stack gas, Emission Factors. incinerators remain as a major source from the industrial activities, responsible for 30-56, 38 and 87%, respectively, of the total emissions (UNEP, 1999) [1]. In the UK [2], the emissions from metal sector including sinter plants, steel and non-ferrous metals, contribute in total dioxin emissions from 15 to 26%. The PCDD/Fs emissions inventory in Taiwan has reported .